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7/27/2019 03 Fun With Stoichiometry
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Grade 09 Intro Chemistry Student Name: _________________________
Stoichiometry & The Mole Date: _______
Fun with Stoichiometry Part 1Show all your working, going step-by-step. When you’re done, check on the answer sheet.
N2(g) + H2(g) -----> NH3(g)
Nitrogen hydrogen ammonia
1. Balance the equation and then answer these questions.
2. How many moles of ammonia form when 4.2 moles of nitrogen (N2) react?
3. How many moles of hydrogen (H2) react when 5.5 moles of nitrogen react?
4.
What mass of ammonia forms when 3.3 moles of hydrogen (H2) react?
5. What mass of nitrogen (N2) is used when 3.7 moles of ammonia is formed?
6. What mass of nitrogen (N2) reacts when 2.8 g of hydrogen react?
7. What mass of nitrogen reacts when 10.1 g of ammonia forms?
8. What mass of hydrogen reacts when 3.4 moles of nitrogen reacts?
9. How many molecules of ammonia form when 3.4 g of nitrogen reacts?
Fun with Stoichiometry Part 2Show all your working, going step-by-step. When you’re done, check on the answer sheet.
7/27/2019 03 Fun With Stoichiometry
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Grade 09 Intro Chemistry Student Name: _________________________
Stoichiometry & The Mole Date: _______
Na2SO4 + AlCl3 ---> NaCl + Al2(SO4)3
Word equation: _____________ ____________ _____________ _______________
1. Balance the equation and then answer these questions.
2. 3.2 moles of aluminum chloride react. How many moles of sodium chloride form?
3. 3.3 moles of sodium sulfate react. How many moles of aluminum chloride react?
4. 7.2 moles of aluminum sulfate form. How many moles of sodium chloride form?
5. 0.55 mole of sodium chloride form. How many moles of sodium sulfate reacted?
6. What is the mass of the reacted sodium sulfate in question 5?
7. What mass of sodium chloride forms when 4.1 moles of aluminum chloride reacts?
8. What mass of aluminum sulfate forms when 8.1 moles of sodium chloride forms?
9. What mass of sodium sulfate reacts when 35 g of sodium chloride forms?
10. 4.5 moles of aluminum sulfate form. How many molecules of aluminum chloride reacted?
7/27/2019 03 Fun With Stoichiometry
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Grade 09 Intro Chemistry Student Name: _________________________
Stoichiometry & The Mole Date: _______
Fun with Stoichiometry Part 1Show all your working, going step-by-step. When you’re done, check on the answer sheet.
N2(g) + 3 H2(g) -----> 2 NH3(g)
Nitrogen hydrogen ammonia
1. Balance the equation and then answer these questions.
2. How many moles of ammonia form when 4.2 moles of nitrogen (N2) react?
4.2 mol N2 x2 mol NH3
1 mol N2
= 8.4 mol NH3
3. How many moles of hydrogen (H2) react when 5.5 moles of nitrogen react?
5.5 mol N2 x
3 mol H2
1 mol N2
= 17 moles H2 (2 SF)
4. What mass of ammonia forms when 3.3 moles of hydrogen (H2) react?
3.3 mol H2 x
2 mol NH3
3 mol H2
x
17 g NH3
1mol NH3
= 37 g NH3
5. What mass of nitrogen (N2) is used when 3.7 moles of ammonia is formed?
3.7 mol NH3 x
1 mol N2
2mol NH3
x
28 g N 2
1 mol N2
=52 g N2
6. What mass of nitrogen (N2) reacts when 2.8 g of hydrogen react?
2.8 g H2 x
1 mol H2
2 g H 2
x
1 mol N2
3 mol H2
x
28 g N2
1 mol N2
= 13 g N2
7. What mass of nitrogen reacts when 10.1 g of ammonia forms?
10.1 g NH3 x
1 mol NH3
17 g NH3
x
1 mol N2
2 mol NH3
x
28 g N2
1 mol N2
= 8.32 g N2 (3 SF )
8. What mass of hydrogen reacts when 3.4 moles of nitrogen reacts?
3.4 mol N2 x
3 mol H2
1 mol N2
x
2 g H2
1 mol H2
= 2.0 x 101 g H2 (2 SF)
9. How many molecules of ammonia form when 3.4 g of nitrogen reacts?
3.4 g N2 x
1 mol N2
28 g N 2
x
2 mol NH3
1 mol N2
x
6.02 x 1023 molecules
1 mol NH3
=1.5 x 1023 molecules NH3
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Grade 09 Intro Chemistry Student Name: _________________________
Stoichiometry & The Mole Date: _______
Fun with Stoichiometry Part 2Show all your working, going step-by-step. When you’re done, check on the answer sheet.
3 Na2SO4 + 2 AlCl3 ---> 6 NaCl + Al2(SO4)3
Word equation: _____________ ____________ _____________ _______________
1. Balance the equation and then answer these questions.
2. 3.2 moles of aluminum chloride react. How many moles of sodium chloride form?
3.2 moles AlCl3 x
6 mol NaCl
2 mol AlCl3
= 9.6 mol NaCl
3. 3.3 moles of sodium sulfate react. How many moles of aluminum chloride react?
3.3 mole Na2SO4 x
2 mol AlCl3
3 mol Na2SO4
= 2.2 mol AlCl3
4. 7.2 moles of aluminum sulfate form. How many moles of sodium chloride form?
7.2 mole Al2(SO4)3 x
6 mol NaCl
1 mol Al2(SO4 )3
= 43 mol NaCl
5. 0.55 mole of sodium chloride form. How many moles of sodium sulfate reacted?
0.55 mol NaCl x
3 mol Na2SO4
6 mol NaCl= 0.28 mol Na2SO4
6. What is the mass of the reacted sodium sulfate in question 5?
0.28 mol Na2SO4 x
142 g
1 mol= 40. mol Na2SO4 (2 SF)
7. What mass of sodium chloride forms when 4.1 moles of aluminum chloride reacts?
0.28 mol Na2SO4 x
142 g
1 mol= 40. mol Na2SO4 (2 SF)
8. What mass of aluminum sulfate forms when 8.1 moles of sodium chloride forms?
8.1 mol NaCl x
1 mol Al2(SO4 )3
6 mol NaClx
342 g
1 mol Al2(SO4 )3
= 460 g Al2(SO4)3
9. What mass of sodium sulfate reacts when 35 g of sodium chloride forms?
35 g NaCl x
1 mol NaCl
58 g NaClx
3 mol Na2SO4
6 mol NaClx
142 g Na2SO4
1 mol Na2SO4
= 43 g Na2SO4
10. 4.5 moles of aluminum sulfate form. How many molecules of aluminum chloride reacted?
4.5 mol Al2(SO4)3 x
2 mol AlCl3
1 mol Al2(SO4 )3
x
6.02 x1023molecules
1mol AlCl= 5.4 x 1024 molecules AlCl3
